松辽盆地南部海里吐地段泉头组铀成矿特征分析

Analysis on uranium ore forming features of Quantou Formation in Hailitu area, south of Songliao Basin

对松辽盆地南部海里吐地段泉头组1、2、3段岩性-岩相及砂体、后生蚀变、铀矿化特征等进行了分析,认为泉头组1段具有较好的地浸砂岩型铀成矿前景,提出铀成矿有类似钱家店铀矿床,即"成矿前富含炭质、有机质砂体预富集-断裂构造煤成气或油气有机流体还原褪色蚀变与铀叠加富集-层间氧化作用"三位一体的成矿模式,预测海里吐地段黑五家子—协尔苏远景区为进一步工作的有利地段。

Based on the lithological-lithofacies, sand bodies, epigenetic alteration, uranium mineralization of the first, second and third members of Quantou Formation in Hailitu area, south of Songliao Basin, it is considered that the first member of Quantou Formation has better metallogenic prospect for the in-situ leachable sandstone-type uranium deposit. It is suggested that the metallogenic model is similar to that of Qianjiadian Deposit, which is a metallogenic model of trinity with pre- concentration by carbonaceous and organic matter in sand bodies concentration superposed by the altered reduction of organic fluid, methane or oil-gas in faults and interlayer oxidation. It is predicted that Heiwujiazi-Xieersu prospective area is a favorable segment for further working.